Using ipad pro and apple pencil as a graphics tablet
I have not found a solution after doing some research. But, there are possible ways to work around it.
If you have a Mac, then it might be possible to use Sidecar, allowing you to use your iPad with your machine. Unfortunately, I have yet to try it, my machine is too old so it does not support it.
There are also apps that can let your iPad control another computer. While touch is definitely supported, I do not think they will have the pressure detection features of the apple pencil.